CN105064720B - Self-supporting steel bar truss floor support plate support structure - Google Patents

Abstract

The invention discloses a self-supporting steel bar truss floor deck support structure, which comprises a steel bar truss floor deck and a support assembly located below the steel bar truss floor deck; the support assembly withstands the galvanized steel plate, and The support assembly is supported directly below a part of the contact points between the web steel bar and the galvanized steel sheet, and this part is the support part of the lower end surface of the galvanized steel sheet; the fastener is arranged on the Among the several contact points between the web steel bar and the galvanized steel sheet, other contact points except the contact points directly above the support part are used. By adopting the above-mentioned technical scheme, the self-supporting steel bar truss floor deck support structure of the present invention can effectively ensure the thickness of the filled steel bar protective layer and effectively reduce the deformation of the galvanized steel formwork compared with the prior art, which is beneficial to The reuse of steel formwork in the later period; the flatness and appearance quality of the concrete floor slab have been greatly improved.

Description

Self-supporting reinforced truss floor deck support structure

technical field

The invention relates to the field of concrete structure building construction, in particular to a self-supporting reinforced truss floor deck support structure.

Background technique

The steel truss floor deck is a kind of unsupported pressure-type composite floor deck; the steel truss is finalized and processed in the background processing field, and the on-site construction needs to first fix the pressure plate on the steel beam with bolts, and then place the steel truss Binding is carried out, and concrete is poured after acceptance. For example, Chinese patent document CN 103352563 A discloses a self-supporting slab-type reinforced grid composite template, including a self-supporting slab-type reinforced grid unit, which includes multiple rows of longitudinal steel trusses, and a single row of longitudinal steel trusses consists of upper chord bars, two The lower chord bar and the corrugated bar arranged between the upper chord bar and the lower chord bar; multiple rows of horizontally distributed steel bars, and a single row of horizontally distributed steel bars are fixed to the longitudinal steel bar truss; a detachable formwork is located at the self The lower part of the plate-type reinforced grid unit is fixedly connected with the self-supporting plate-type reinforced grid unit.

During the construction of the large-span reinforced truss floor slab, it is necessary to add a temporary support in the middle of the span. The temporary support is composed of steel pipes, jacking wires, and square wood, and is supported on the bottom of the floor slab to ensure that the floor slab will not There is a large deflection. However, since there is a gap in the thickness of the protective layer between the galvanized steel plate that directly contacts the square timber and the steel truss, the deformation of the galvanized steel plate during pouring produces negative deflection at the top position, which affects the thickness of the protective layer of the steel bar and the appearance of the concrete. As shown in Figures 1 and 2, the general roofing scheme for the floor deck of a long-span steel truss is as follows: The floor deck of a steel truss includes upper chord reinforcement 101, lower chord reinforcement 102, web reinforcement 103, galvanized steel plate 100, and fasteners 200. The fastener 200 is installed on the web steel bar 103 and the galvanized steel plate 100 to buckle the web steel bar 103 and the galvanized steel plate 100. Since the fastener 200 protrudes downward at the lower end of the galvanized steel plate 100, only The support assembly 1 can be arranged between two rows of fasteners 200, where the upper chord reinforcement 101 of the steel truss corresponds to the vertical direction, the upper chord reinforcement 101 is not in contact with the galvanized steel plate 100 and there is a large gap, when pouring the floor slab When concrete is used, the steel plate at the top will produce negative deflection deformation, and the protective layer of steel bars filled here will become thinner, and the floor slab will also have obvious appearance defects.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, so as to provide a self-supporting steel bar that does not deform the galvanized steel sheet, not only ensures the appearance quality of the floor slab but also ensures the thickness of the filled steel bar protective layer Truss deck support structure.

In order to achieve the above object, a self-supporting steel truss floor deck support structure of the present invention includes a steel bar truss floor deck and a support assembly located below the steel bar truss floor deck; the steel bar truss floor deck includes an upper chord steel bars, lower chord steel bars, web steel bars, galvanized steel sheets and fasteners, the galvanized steel sheets are located below the lower chord steel bars and are fixed to the web steel bars by fasteners; the support components withstand the galvanized steel plate, and the support assembly is supported directly below a part of the contact points between the web steel bar and the galvanized steel plate, which is the support part of the lower end surface of the galvanized steel plate; the fastener It is arranged at the position of several contact points between the web steel bar and the galvanized steel plate except the contact point directly above the support part.

The support assembly includes a long square log and a steel pipe supporting the square log.

A top wire is also arranged between the steel pipe and the square wood.

The contact portion is a straight line area and is arranged parallel to the lower chord reinforcement.

The span of the reinforced truss floor deck is L, and when 3.3≤L<6.6m, a support assembly is arranged in the middle of the span.

The span of the reinforced truss floor deck is L, and when 6.6≤L<9.9m, two support assemblies are arranged in the middle of the span.

The contact portion is a straight line area, and is arranged at an angle with the lower chord steel bar.

The included angle is 90°.

By adopting the above technical scheme, the self-supporting steel truss floor deck support structure of the present invention, compared with the prior art, can effectively ensure the thickness of the filled steel protective layer, effectively reduce the deformation of the galvanized steel formwork, and facilitate The reuse of steel formwork in the later period; the flatness and appearance quality of the concrete floor slab have been greatly improved.

Description of drawings

Fig. 1 is the bottom view of prior art.

Figure 2 is a side view of the prior art.

Fig. 3 is a structural bottom view of Embodiment 1 of the present invention.

Fig. 4 is a bottom view of the structure of Embodiment 2 of the present invention.

Figure 5 is a side view of the present invention.

detailed description

The present invention will be further described in detail through the accompanying drawings and specific embodiments below.

Example 1

This embodiment provides a self-supporting steel truss floor deck support structure, as shown in Figures 3 and 5, including a steel bar truss floor deck and a supporting component located below the steel bar truss floor deck.

The steel bar truss floor deck includes an upper chord steel bar 101, a lower chord steel bar 102, a web bar 103, a galvanized steel plate 100 and a fastener 200. The galvanized steel plate 100 is located below the lower chord steel bar 102 and is connected to The web steel bar 103 is fixed.

The support assembly bears against the galvanized steel sheet 100, and the support assembly is supported directly below a part of contact points 800a among the contact points 800 between the web steel bar 103 and the galvanized steel sheet 100. That is, the support portion 900 on the lower end surface of the galvanized steel sheet; the fastener 200 is set at several contact points between the web steel bars 103 and the galvanized steel sheet 100 except the The positions of some contact points 800a and other contact points 800b.

The support assembly includes a rectangular wood 301 and a steel pipe 302 against the square wood 301 .

A top wire 303 is also provided between the steel pipe 302 and the square wood 301 .

The contact portion 900 is a straight line area and is arranged parallel to the lower chord reinforcement 102 .

The span of the reinforced truss floor deck is L, and when L<3.3m, no support assembly is required; when 3.3≤L<6.6m, a support assembly is set in the middle of the span; when 6.6≤L<9.9m , set two support components in the span.

By adopting the above technical scheme, the self-supporting steel truss floor deck support structure of the present invention, compared with the prior art, can effectively ensure the thickness of the filled steel protective layer, effectively reduce the deformation of the galvanized steel formwork, and facilitate The reuse of steel formwork in the later period; the flatness and appearance quality of the concrete floor slab have been greatly improved.

Example 2

As another modification of Embodiment 1, the contact portion 900 in Embodiment 2 is a straight line area, and is arranged at an angle with the lower chord reinforcement 102 . As shown in Figure 4, the included angle is 90°.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (3)

1. A self-supporting steel truss floor deck support structure, characterized in that: it comprises a steel bar truss floor deck and a support assembly positioned below the steel bar truss floor deck; the steel bar truss floor deck includes upper chord steel bars, The lower chord reinforcement, the web reinforcement, the galvanized steel sheet and the fastener, the galvanized steel sheet is located below the lower chord reinforcement and is fixed to the web reinforcement by the fastener; the support assembly withstands the galvanized steel sheet, And the support assembly is supported directly below a part of the contact points between the web steel bar and the galvanized steel sheet, and this part is the support part of the lower end surface of the galvanized steel sheet; the fastener is arranged on Among the several contact points between the web reinforcing bar and the galvanized steel plate, the positions of other contact points except the contact points directly above the support part are excluded; the contact part is a straight line area and forms an included angle with the lower chord reinforcing bar setting; the included angle is 90°. 2. The self-supporting reinforced truss floor deck support structure according to claim 1, characterized in that: the support assembly comprises a long square log and a steel pipe supporting the square log. 3. The self-supporting reinforced truss floor deck support structure according to claim 2, characterized in that: jacking wires are provided between the steel pipe and the square timber.